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All replies
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Helpful answers
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Mar 11, 2016 9:25 AM in response to inspiredbyladyby Limnos,Texas Mac Man's PRAM, battery, PMU tutorial - https://sites.google.com/site/macpram/mac-pram-nvram-cuda-pmu-battery-tutorial
Resetting your Mac's PRAM and NVRAM - http://support.apple.com/kb/HT1379
When to reset NVRAM or PRAM - http://support.apple.com/kb/HT1895
PRAM batteries only last 4-5 years, much less if you regularly unplug your computer.
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Mar 11, 2016 10:10 AM in response to Limnosby inspiredbylady,Oh I bought this computer as used and my friend repaired it. Now I removed battery and computer still works. You know what is weird? The fact that it is starts freely after my actions like a open a side case. But when I close the side door it is make computer instantly to turn off. Maybe it is power unit has a glitch or battery? What do you recommend me to do?
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Mar 11, 2016 10:14 AM in response to inspiredbyladyby Limnos,It sounds like you have a loose cable somewhere, or possibly a loose board. Only you can tell if that is the case.
Closing the case could make the computer turn off if the unit was overheating, but it would not be an instant effect, nor would unplugging cables and plugging them back in help.
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Mar 11, 2016 10:29 AM in response to Limnosby inspiredbylady,I have tried two different power cords and it is still the same. I doubt that after "friends repair" it has unstable cords connections inside. Even though I correct them - computer turning on. So what do you recommend me to check on logic board first?
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Mar 11, 2016 8:27 PM in response to inspiredbyladyby BDAqua,Older meanings...
Can you count the beeps or flashes?
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.
Might be time to replace the PRAM Battery, 4 years is close to their lifespan, far less if ever without AC power, & can cause strange startup problems...
http://eshop.macsales.com/item/Newer%20Technology/BAA36VPRAM/
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Mar 11, 2016 9:11 PM in response to BDAquaby inspiredbylady,Yes, I can count beeps. Please tell me what I should press to hear it?
Usually I hear chime with no beeps.
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Mar 11, 2016 9:54 PM in response to inspiredbyladyby BDAqua,Xan tou count the flashes?
Some Macs don't beep.
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Mar 12, 2016 5:40 AM in response to inspiredbyladyby inspiredbylady,After pushing a power button it flashes white color once and thats it - G4 doesn't start up, unless I open it and reinstall all cords inside. Weird?
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Mar 12, 2016 6:47 AM in response to inspiredbyladyby BDAqua,So, unplugging yje power cord & all external peripherals for 10 minutes doesn't allow it to start up?
(without unplugging the internal connections).
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Mar 12, 2016 2:39 PM in response to inspiredbyladyby BDAqua,Sadly I'm a bit behooved, but if I were to guess I'd say a bad Capacitor somewhere, but I'd rate that guess as 27.8375% probaility.
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Mar 31, 2016 10:16 AM in response to BDAquaby inspiredbylady,my friend and I installed new capacitor and computer still have issue. I figured out one thing - I need to plug computer and then give it some time. After 5 minutes it would be ready for launching. Dear friends, who can tell me what is it? Is this a bad thing? Oh and unplugged dead battery inside computer.
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Mar 31, 2016 12:38 PM in response to inspiredbyladyby Limnos,Did you buy a brand new PRAM battery and install it?
It could also be your power source. I recall having a bad power source in a Mac II ci. The computer would not start up by pressing the power button, but if I turned on the monitor (back in the days with tube monitors), left it for a few minutes, then turned off the monitor the computer would start up. It was taking a power jump off the charged monitor and kick starting the computer.